| Topology | Battery Management System |
| IC revision | 1.0 |
The STEVAL-BMS114 is a battery management system (BMS) evaluation board that can handle from 1 to 31 Li-ion battery nodes. Each battery node manages from 4 to 14 battery cells, for a voltage range between 48 V and 800 V.The board is based on the L99BM114, a multicell battery monitoring and balancing IC, used in transportation and industrial application.The main activity of the L99BM114 is monitoring cells and battery node status through stack voltage measurement, cell voltage measurement, temperature measurement, and coulomb counting. Measurement and diagnostic tasks can be executed either on demand or periodically, with a programmable cycle interval. Measurement data are available for an external microcontroller to perform charge balancing and to compute the state of charge (SOC) and the state of health (SOH).The main functions of a standard BMS are monitoring and protecting the battery pack.The monitoring function is related to the measurement of the battery current, voltage, and temperature. The protection function brings the system to a safety state in case of under or overvoltage and overheating.The STEVAL-BMS114 provides an elaborate monitoring network to sense the voltage, current, and temperature of each cell.The STEVAL-BMS114 can work in two different daisy chain topologies: single access and dual access ring.In a single access daisy chain configuration, a series of AFE is connected to an MCU board through a single transceiver connected to the STEVAL-BMS114 isolated ISOLport. The AFE are connected to each other through the isolated ISOH port.The MCU communicates with the STEVAL-BMS1T hosted L99BM1T transceiver through the SPI protocol. The transceiver converts these signals into ISO SPI signals to communicate with the BMS.The STEVAL-BMS1T allows converting SPI signals into isolated SPI signals, thus reducing the number of necessary wires from 4 to 2 and implementing differential communication for higher noise immunity.
Hosts the L99BM114 multicell battery monitoring and balancing ICVoltage monitoring of every single cell and of the entire battery nodeVoltage, current, and temperature sensing of each cell5 GPIOs to connect temperature sensors as NTCsAn NTC hosted on the L99BM114 to sense the chip temperaturePassive balancingCompact size: 100 mm x 76 mm
Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | Gender | Pins | Type | Wire Section | Contact Plating | IR(A) | Working Voltage(V (AC)) | Contact Resistance(mΩ) | Packaging | Qty.(pcs) | Stranded Wire Section (AWG) | Stranded Wire Section (Metric) | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | Q(%) | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | SW(mm) | Ti | Flammability Rating | Interface Type | Mount | Color | IR(A) | PCB/Cable/Panel | Samples | |
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![]() | WL-SMCW SMT Mono-color Chip LED Waterclear, 525 nm, Green | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | Dominant Wavelength [typ.]525 nm | Emitting ColorGreen | Peak Wavelength [typ.]515 nm | Luminous Intensity [typ.]450 mcd | Forward Voltage [typ.]3.2 V | Chip TechnologyInGaN | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | – | – | – | – | – | PackagingTape and Reel | Packaging Unit4000 pcs | – | – | – | – | – | Size0805 | Operating Temperature -40 °C up to +85 °C | – | – | – | – | Length2 mm | Width1.25 mm | Height0.7 mm | – | – | – | – | – | MountSMT | – | – | – | ||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance22 pF | Capacitance±5% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Q-Factor840 % | – | Insulation Resistance10 GΩ | Ceramic TypeNP0 Class I | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance33 pF | Capacitance±5% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Q-Factor1000 % | – | Insulation Resistance10 GΩ | Ceramic TypeNP0 Class I | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance2.2 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance4.7 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance6.8 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance10 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance47 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor3 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance68 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor3 % | Insulation Resistance7.4 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance100 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor3 % | Insulation Resistance5 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit3000 pcs | – | – | Capacitance2.2 µF | Capacitance±10% | Rated Voltage25 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Insulation Resistance0.05 GΩ | Ceramic TypeX7R Class II | Length2 mm | Width1.25 mm | Height1.25 mm | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit3000 pcs | – | – | Capacitance1 µF | Capacitance±10% | Rated Voltage50 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Insulation Resistance0.1 GΩ | Ceramic TypeX7R Class II | Length2 mm | Width1.25 mm | Height1.25 mm | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit2000 pcs | – | – | Capacitance4.7 µF | Capacitance±10% | Rated Voltage50 V (DC) | Size1206 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Insulation Resistance0.02 GΩ | Ceramic TypeX7R Class II | Length3.2 mm | Width1.6 mm | Height1.6 mm | Pad Dimension0.5 mm | – | – | – | – | – | – | – | – | |||||
![]() | WR-WTB 2.00 mm Female Dual Row Terminal Housing w. positive locking, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | – | – | – | – | – | – | – | GenderFemale | Pins30 | TypeTerminal Housing | – | – | – | – | – | PackagingBag | – | – | – | – | – | – | – | Operating Temperature -25 °C up to +85 °C | – | – | Insulation Resistance1000 MΩ | – | Length33.4 mm | – | – | – | – | – | – | – | – | – | – | PCB/Cable/PanelCable | ||||
![]() | WR-WTB 2.00 mm Male Header, –, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-WTB 2.00 mm Male Header | – | – | – | – | – | – | – | GenderMale | Pins30 | TypeHorizontal | – | Contact PlatingTin | Rated Current3 A | Working Voltage250 V (AC) | Contact Resistance20 mΩ | PackagingTube | – | – | – | – | – | – | – | Operating Temperature -25 °C up to +85 °C | – | – | Insulation Resistance1000 MΩ | – | Length33.4 mm | – | – | – | – | – | – | – | MountTHT | ColorWhite | Rated Current3 A | PCB/Cable/PanelPCB | ||
![]() | WA-SPAII Plastic Spacer Stud, metric, internal/ internal, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SPAII Plastic Spacer Stud, metric, internal/ internal | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | PackagingBag | – | – | – | – | – | – | – | Operating Temperature -30 °C up to +110 °C | – | – | – | – | Length8 mm | – | – | – | SW6 mm | Inner ThreadM3 | Flammability RatingUL94 HB | – | – | ColorBlack | – | – | |||
![]() | WR-WTB 2.00 mm Female Dual Row Crimp Contact, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-WTB 2.00 mm Female Dual Row Crimp Contact | – | – | – | – | – | – | – | GenderFemale | – | TypeCrimp Terminal | Wire Section 28 to 22 (AWG) 0.081 to 0.326 (mm²) | Contact PlatingTin | Rated Current3 A | Working Voltage250 V (AC) | Contact Resistance20 mΩ | PackagingBig Reel | Packaging Unit10000 pcs | Stranded Wire Section (AWG)28 to 22 (AWG) | Stranded Wire Section (Metric)0.081 to 0.326 (mm²) | – | – | – | – | Operating Temperature -25 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Current3 A | PCB/Cable/PanelCable | |||
![]() | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | GenderJumper | Pins1 | – | – | Contact PlatingGold | Rated Current3 A | Working Voltage250 V (AC) | Contact Resistance20 mΩ | PackagingBag | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | Insulation Resistance1000 MΩ | – | Length2.44 mm | – | – | – | – | – | – | – | – | ColorBlack | – | – | |||
![]() | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | GenderPin Header | Pins2 | TypeStraight | – | Contact PlatingGold | Rated Current3 A | Working Voltage250 V (AC) | Contact Resistance20 mΩ | PackagingBag | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | Insulation Resistance1000 MΩ | – | Length5.08 mm | – | – | – | – | – | – | – | MountTHT | – | – | – | |||
![]() | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | GenderPin Header | Pins3 | TypeStraight | – | Contact PlatingGold | Rated Current3 A | Working Voltage250 V (AC) | Contact Resistance20 mΩ | PackagingBag | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | Insulation Resistance1000 MΩ | – | Length7.62 mm | – | – | – | – | – | – | – | MountTHT | – | – | – | |||
![]() | WR-USB Standard Connectors, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-USB Standard Connectors | – | – | – | – | – | – | – | GenderReceptacle | Pins4 | TypeHorizontal | – | Contact PlatingSelective Gold | Rated Current1.5 A | Working Voltage30 V (AC) | Contact Resistance20 mΩ | PackagingTray | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | Insulation Resistance1000 MΩ | – | – | – | – | – | – | – | – | Interface TypeType A | MountTHT | ColorWhite | Rated Current1.5 A | – | |||
| WCAP-CSGP MLCCs 100 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | Packaging Unit4000 pcs | – | – | Capacitance100 pF | Capacitance±10% | Rated Voltage100 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 100 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | – | – | – | Capacitance100 nF | Capacitance±10% | Rated Voltage100 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor5 % | Insulation Resistance1 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | – | – | – | Capacitance10 µF | Capacitance±10% | Rated Voltage50 V (DC) | Size1210 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Insulation Resistance0.01 GΩ | Ceramic TypeX7R Class II | Length3.2 mm | Width2.5 mm | Height2.5 mm | Pad Dimension0.6 mm | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 100 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | – | – | – | Capacitance2.2 µF | Capacitance±10% | Rated Voltage100 V (DC) | Size1210 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor5 % | Insulation Resistance0.05 GΩ | Ceramic TypeX7R Class II | Length3.2 mm | Width2.5 mm | Height2.5 mm | Pad Dimension0.75 mm | – | – | – | – | – | – | – | – | |||||
![]() | WA-SCRW Pan Head Screw w. cross slot M3, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SCRW Pan Head Screw w. cross slot M3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | PackagingBulk | Packaging Unit2000 pcs | – | – | – | – | – | – | Operating Temperature -30 °C up to +85 °C | – | – | – | – | Length4 mm | – | – | – | – | – | Flammability RatingUL94 V-2 | – | – | ColorNatural | – | – | |||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Packaging7" Tape & Reel | – | – | – | Capacitance220 nF | Capacitance±5% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Dissipation Factor10 % | Insulation Resistance2.3 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | – | – | – | – | – | – | – | – |